Brand: Enduro Enduro Range: Ceramic ZERO Measurement Unit: Metric Inside Diameter: 18.00mm Outside Diameter: 30.00mm Width: 7.00mm Seals or Shields: Rubber Seals Clearance: C3 CØ MR-18307-LLB Zero Ceramic Enduro Bike Bearing 18x30x7 Silicon Nitride (Si3n4) Grade 3 balls Magnetite Rust Proof Finish Typical applications: Hub Bearings ZERØ ceramic bearings have ceramic balls and steel races. The balls are Grade 3, Silicon Nitride (Si3n4). The races are treated with a black oxide coating, which helps prevent rusting in the bearing. The races are then reground to a mirror finish after this treatment. Finally, they are cryogenically treated for strength before assembly. Si3N4 balls with 52100 High carbon Chromium Alloy Races with Cryogenic Treatment:
 Cryogenic treatment takes the races down to minus three hundred degree Fahrenheit to normalize the crystalline structure of the material so the races will resist the hardness of the ceramic balls and get the maximum wear potential. Can Whatsapp only . https://wa.me/60126960321 Vince . office 03-80608967 Operation Hour Monday to Saturday (10.30AM TO 7PM) *Sunday Close* ----------------------------------------------- VK CYCLES PUCHONG Map - https://goo.gl/maps/8y79tAyzkEE2 (LOCATION) No 39, Jalan BP 7/2 , Bandar Bukit Puchong, 47100, Selangor , Puchong Facebook - https://www.facebook.com/SpecialistRepairBicycles/ Instagram - VK CYCLES